[COMMON] fix logic of post upgrade hook script to handle upgrade run without any changes to charts that could cause loss of all data.

Issue-ID: OOM-2442
Signed-off-by: Marat Salakhutdinov <marat.salakhutdinov@bell.ca>
Change-Id: Ifd3bbc0f63e95b1c8797ecd09a891195faafc8c2
diff --git a/kubernetes/common/mariadb-galera/templates/job.yaml b/kubernetes/common/mariadb-galera/templates/job.yaml
index cc71bb8..db56f3e 100644
--- a/kubernetes/common/mariadb-galera/templates/job.yaml
+++ b/kubernetes/common/mariadb-galera/templates/job.yaml
@@ -72,6 +72,8 @@
               fieldRef:
                 apiVersion: v1
                 fieldPath: metadata.namespace
+        - name: REPLICA_COUNT
+          value: "{{ .Values.replicaCount }}"
         command: ["/bin/bash", "-c", "--"]
         args: ["/upgrade/post-upgrade-script.sh"]
         volumeMounts: